Fig. 1. (a)(b) Time and frequency domains of continuous wave laser and optical frequency comb; (c) (d) schematics of electrical pulse generator and frequency modulation

Fig. 2. (a) Experimental setup of electro-optic comb; (b) photodetector traces for the output pulse of EOM (repetition frequency of 700 MHz); (c) electro-optic comb pulse width with different repetition frequencies

Fig. 3. (a) The output spectrum of HNLF displayed in a range from 1540 nm to 1560 nm; (b) (c) autocorrelation traces for the pulses before and after the temporal compression; (d) autocorrelation traces for the pulses at different repetition frequencies

Fig. 4. Electro-optic comb pulse width at different modulation frequencies

Fig. 5. (a)(b)Beat notes measured at the wavelengths of 1549 nm and 1554 nm, respectively

Fig. 6. (a) (b) Schematic diagrams of phase noise measurements and the feed-forward phase control system

Fig. 7. (a) Phase noise spectra measured for the comb outputted after EOM, EDFA, HNLF, SMF, and after the phase suppression with an acousto-optic modulator; (b) beat note signal of phase-controlled optical comb and 1554 nm CW laser